body {
    font-family: Arial, sans-serif;
    text-align: center;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    padding: 10px;
    display: flex;
    justify-content: space-between;
    background: #f4f4f4;
    margin: 5px;
    cursor: pointer;
}

li.bought {
    text-decoration: line-through;
    background: #ddd;
}

input {
    display: flex;
    justify-content: space-between;
    width: 100%;
    height: 2em;
    font-size: 1em;
}

button {
    width: 100%;
    height: 2em;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    background-color: rgb(71, 119, 204);
    color: white; 
    font-weight: bold;
    font-size: 1em;
    border-radius: 5px;
}